Developmental assessment of human vitrified-warmed blastocysts based on oxygen consumption

Masaya Yamanaka, Shu Hashimoto, Ami Amo, Takahiro Ito-Sasaki, Hiroyuki Abe, Yoshiharu Morimoto

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Background: In this study, we aimed to develop a model for embryo selection based on oxygen consumption following cryopreservation, the relationship between the developmental competence of blastocysts and their oxygen consumption was assessed.Methods: Oxygen consumption of vitrified-warmed human blastocysts was measured at 0, 1.5, 3, 4.5, 6, 7.5, 9 and 24 h after warming using scanning electrochemical microscopy. On the basis of their developmental stage at 24 h, blastocysts were classified into four groups (hatched, hatching, arrested and degenerated). Moreover, cytochrome c oxidase (CCO) activity in vitrified-warmed blastocysts was assessed at 0 and 24 h.Results: The oxygen consumption rate of blastocysts just after warming was significantly lower than that of non-vitrified blastocysts (P< 0.05). The oxygen consumption rate of blastocysts was significantly higher in the hatched group than in the arrested and the degenerated groups after 1.5 h (P< 0.05) and than in the hatching group (P< 0.05) at 7.5 and 9 h. Moreover, CCO activity was absent in vitrified-warmed blastocysts at 0 h, but was detected at 24 h. Conclusions: The respiratory rate of vitrified blastocysts after warming was significantly lower than non-cryopreserved blastocysts. Oxygen consumption of blastocysts with high developmental potential was restored earlier than that of blastocysts with low developmental potential. The Results: of this study suggest that it is possible to select vitrified-warmed blastocysts with high developmental potential based on their respiratory activity.

Original languageEnglish
Pages (from-to)3366-3371
Number of pages6
JournalHuman Reproduction
Volume26
Issue number12
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • human
  • oxygen consumption
  • vitrified-warmed blastocyst

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynaecology

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    Yamanaka, M., Hashimoto, S., Amo, A., Ito-Sasaki, T., Abe, H., & Morimoto, Y. (2011). Developmental assessment of human vitrified-warmed blastocysts based on oxygen consumption. Human Reproduction, 26(12), 3366-3371. https://doi.org/10.1093/humrep/der324